From cca4818eb7769d6e776bdc30516a5f871f1d6393 Mon Sep 17 00:00:00 2001 From: Joshua Haberman Date: Sat, 31 Mar 2012 12:17:32 -0700 Subject: Sync from internal Google development. --- upb/stdc/error.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 upb/stdc/error.c (limited to 'upb/stdc/error.c') diff --git a/upb/stdc/error.c b/upb/stdc/error.c new file mode 100644 index 0000000..313866c --- /dev/null +++ b/upb/stdc/error.c @@ -0,0 +1,44 @@ +/* + * upb - a minimalist implementation of protocol buffers. + * + * Copyright (c) 2009 Google Inc. See LICENSE for details. + * Author: Josh Haberman + * + * Handling of errno. + */ + +#include "upb/stdc/error.h" + +#include +#include + +void upb_status_fromerrno(upb_status *status, int code) { + if (code != 0 && !upb_errno_is_wouldblock(code)) { + status->error = true; + upb_status_setcode(status, &upb_stdc_errorspace, code); + } +} + +bool upb_errno_is_wouldblock(int code) { + return +#ifdef EAGAIN + code == EAGAIN || +#endif +#ifdef EWOULDBLOCK + code == EWOULDBLOCK || +#endif + false; +} + +bool upb_stdc_codetostr(int code, char *buf, size_t len) { + // strerror() may use static buffers and is not guaranteed to be thread-safe, + // but it appears that it is not subject to buffer overflows in practice, and + // it used by other portable and high-quality software like Lua. For more + // discussion see: http://thread.gmane.org/gmane.comp.lang.lua.general/89506 + char *err = strerror(code); + if (strlen(err) >= len) return false; + strcpy(buf, err); + return true; +} + +upb_errorspace upb_stdc_errorspace = {"stdc", &upb_stdc_codetostr}; -- cgit v1.2.3